TY  - RPRT
TI  - Phenomenological sigma models.
AU  - NN Achasov
AU  - GN Shestakov
PY  - 1994
DO  - 10.1103/physrevd.49.5779
UR  - https://pubmed.ncbi.nlm.nih.gov/10016903/
ID  - 10016903
ER  -